My TL;DR list:
Spem in alium sung by the Tallis Scholars (The Huelgas recording is more balanced, but the pure joy of the Tallis Scholars version with the sopranos seeming to soar into the atmosphere!). Ockeghem's Deo Gratias (Huelgas Ensemble recording). Bruckner's Locus Iste and Gorecki's Totus Tuus (recorded by The Sixteen). Arvo Part's Spiegel im Spiegel and Da Pacem Domine. Karl Jenkins's Benedictus especially the cello solo in the beginning. Gorecki's Symphony No. 3.
Inama Nushif off the Children of Dune OST by Brian Tyler. Though I must admit to having a weakness for bell tones, which also feature in my favourite album (Mike Oldfield's Tubular Bells) and the next track on my list: Sacrament from Richard Einhorn's Voices of Light. The church bell ringing as massed strings join the melody, the sound merging with the low-voiced choir swelling into fullness, and then when the choir breaks into full hymnal voice with "O feminea forma..." with the bell pealing in the background...Really, the whole album is a marvelous piece of music. Thomas Newman's score for Angels in America (in particular the title theme and Plasma Orgasmata and... Actually, just take tracks 24 and 27-31, and that is all.) Elo Hi sung by Ofra Haza from the La Reine Margot soundtrack. Diamanda Galas's vocals. When David Heard, Cloudburst, Lux Aurumque, Kala Kalla from Five Hebrew Love Songs and Leonardo Dreams of His Flying Machine by Eric Whitacre.